package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.OrdersConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.AddressBook;
import com.sky.entity.OrderDetail;
import com.sky.entity.Orders;
import com.sky.entity.ShoppingCart;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.AddressBookMapper;
import com.sky.mapper.OrderDetailMapper;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    //    @Autowired
//    private WeChatPayUtil weChatPayUtil;
//    @Autowired
//    private UserMapper userMapper;
    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;
    @Autowired
    WebSocketServer webSocketServer;

    /**
     * 用户下单
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、超出配送范围、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        this.checkOutOfRange(addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail());
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(OrdersConstant.TO_BE_CONFIRMED);
        order.setPayStatus(OrdersConstant.PAID);
        order.setOrderTime(LocalDateTime.now());
        order.setCheckoutTime(LocalDateTime.now());
        //向订单表插入1条数据
        orderMapper.insert(order);
        //通知客户端来订单了
        this.webSocketBroadcast(1,order.getId(),order.getNumber());
        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }
        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);
        //清理购物车中的数据
        shoppingCartMapper.deleteByUserId(userId);
        //封装返回结果
        return OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();
    }

    /**
     * 历史订单查询
     */
    @Override
    public PageResult pageQuery4User(Integer pageNum, Integer pageSize, Integer status) {
        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> orderVOList = new ArrayList<>();
        if (page != null && page.getTotal() > 0) {
            for (Orders order : page) {
                Long orderId = order.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(order, orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                orderVOList.add(orderVO);
            }
            return new PageResult(page.getTotal(), orderVOList);
        } else {
            return new PageResult(0, orderVOList);
        }

    }

    /**
     * 查询订单详情
     */
    @Override
    public OrderVO details(Long id) {
        Orders order = orderMapper.getById(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(order.getId());
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(order, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 取消订单
     */
    @Override
    public void userCancelById(Long id) {
        Orders order = orderMapper.getById(id);
        if (order == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (order.getStatus() > OrdersConstant.TO_BE_CONFIRMED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        if (order.getStatus().equals(OrdersConstant.TO_BE_CONFIRMED)) {
            order.setPayStatus(OrdersConstant.REFUND);
        }
        order.setStatus(OrdersConstant.CANCELLED);
        order.setCancelReason(OrdersConstant.CANCELLED_BY_USER);
        order.setCancelTime(LocalDateTime.now());
        orderMapper.update(order);
    }

    /**
     * 再来一单
     */
    @Override
    public void repetition(Long id) {
        Long userId = BaseContext.getCurrentId();
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(orderDetail -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> ordersPage = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> orderVOList = this.convertToOrderVOList(ordersPage);
        return new PageResult(ordersPage.getTotal(), orderVOList);
    }

    /**
     * 各个状态的订单数量统计
     */
    @Override
    public OrderStatisticsVO orderStatistics() {
        Integer toBeConfirmed = orderMapper.countStatus(OrdersConstant.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(OrdersConstant.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(OrdersConstant.DELIVERY_IN_PROGRESS);
        return OrderStatisticsVO.builder()
                .toBeConfirmed(toBeConfirmed)
                .confirmed(confirmed)
                .deliveryInProgress(deliveryInProgress)
                .build();
    }

    /**
     * 接单
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(OrdersConstant.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     */
    @Override
    public void reject(OrdersRejectionDTO ordersRejectionDTO) {
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());
        if (orders == null || !OrdersConstant.TO_BE_CONFIRMED.equals(orders.getStatus())) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orders = Orders.builder()
                .id(ordersRejectionDTO.getId())
                .status(OrdersConstant.CANCELLED)
                .payStatus(OrdersConstant.REFUND)
                .rejectionReason(ordersRejectionDTO.getRejectionReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 取消订单
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders orders = Orders.builder()
                .id(ordersCancelDTO.getId())
                .status(OrdersConstant.CANCELLED)
                .payStatus(OrdersConstant.REFUND)
                .cancelReason(ordersCancelDTO.getCancelReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     */
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(OrdersConstant.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(OrdersConstant.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(OrdersConstant.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(OrdersConstant.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }
    /**
     * 用户催单
     */
    @Override
    public void reminder(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        this.webSocketBroadcast(2,id,orders.getNumber());
    }
    /**
     * websocket播报
     */
    private void webSocketBroadcast(Integer type,Long orderId,String content){
        HashMap<String, Object> map = new HashMap<>();
        map.put("type",type);
        map.put("orderId",orderId);
        map.put("content","订单号："+content);
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /**
     * Page<Orders> => List<OrderVO>
     */
    private List<OrderVO> convertToOrderVOList(Page<Orders> ordersPage) {
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> result = ordersPage.getResult();
        if (!CollectionUtils.isEmpty(result)) {
            for (Orders orders : result) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = this.getOrderDishesStr(orders);
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取OrderDishes
     */
    private String getOrderDishesStr(Orders orders) {
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        List<String> orderDishes = orderDetailList.stream()
                .map(orderDetail -> orderDetail.getName() + "*" + orderDetail.getNumber() + ";")
                .collect(Collectors.toList());
        return String.join("", orderDishes);
    }
    /**
     * 检查客户的收货地址是否超出配送范围
     */
    private void checkOutOfRange(String address) {
        Map<String,String> map = new HashMap<>();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }

//    /**
//     * 订单支付
//     */
//    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
//        // 当前登录用户id
//        Long userId = BaseContext.getCurrentId();
//        User user = userMapper.getById(userId);
//
//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
//
//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));
//
//        return vo;
//    }
//
//    /**
//     * 支付成功，修改订单状态
//     */
//    public void paySuccess(String outTradeNo) {
//
//        // 根据订单号查询订单
//        Orders ordersDB = orderMapper.getByNumber(outTradeNo);
//
//        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
//        Orders orders = Orders.builder()
//                .id(ordersDB.getId())
//                .status(OrdersConstant.TO_BE_CONFIRMED)
//                .payStatus(OrdersConstant.PAID)
//                .checkoutTime(LocalDateTime.now())
//                .build();
//
//        orderMapper.update(orders);
//    }

}
